Improvement in patterns toe casting pot-hole oovees



@stitch taire @anni @ffice WILLIAM J, FRYER, OF WEST TROY, NEW YORK, ASSIGNOR TO HIMSELF V AND JOHN I. WITBECK, OF SAME PLAGE.

Lam Parent No. 66,317, @zaad .my 2,1867.

IMPROVEMENT 1N PATTERNS EOE eAsTINe Por-HOLE cov-ERS;

die 'tlphn'lr Infant tu in there rtta's tlrimt ma uniting pat at tip-ramt `Be it known that I, WILLIAM J.' Furlan, of West-Troy, State of New York, have invented a new and useful Method of Constructing Patterns for Mouldings preparatory to casting lips with their cavities to receive handles for the lifting'iof pot-hole covers, and for analogous uses; and I declare the following specification, with the drawings forming part of th'e same, to be a fu'lland complete description of my invention,

p Figure 1 represents in perspective the pattern of a pot-hole cover witlra portionremoved in the line 4of the central vertical section of the'lip and cavity. l

Figure 2, in perspective, a segment of pattern in the usual position for drawing the pattern after moulding. Figure 3 represents implan the upper surface (fractional part) of a pattern with my improvement attached. Figure 4, the under surfaceof the same.' Figure 5, in perspective, a segment of the pattern with the near portion in the line ofwy, iig. .3,removed. 'Figure 6, a vertical `section through 'w tig. 4,

Figure 7, a central vertical section of the core. Simlar'letters denote the same parts. of the apparatus. .Y It is well knownto moulders that it is impossible, with thepatterns new used for moulding pot-hole covers, to prepare the mould in such manner that when the pattern is drawn the core can be put on immediately, and the casting made without some further proeessto form the lip cavity and leave a space'for the metal Vto form 'the lip itself, and that the best process at present to permit the drawing of the pattern, is to malte that part'cf it intended to make the impress for the lip and its carity solid, in the form shownby a, iig. 2, and to insert within the space, after the pattern is drawn, a core shaped like 1J. This can be made of prepared sand or other suitable material, but abright chill of iron, oiled andV sanded, is usually employed, which can, from the shape of its cavity, be driven out after the casting is completed. This operation requires great care and expenditure of time in preparing'and placing the vcore, addingmaterially to the cost of the castings, and it is to obviate this that I propose, by the use of my pattern, which is constructed as follows:

A (figs. 3,'4, and 5,) is the cover-plate; o c c c the usual opening for Vthe introduction of the handle, with its chamber d d below it, east with the plate. An extension of-the opening c c is made through the plate a little wider than itself, extending towards the centre of the plate from e e to ff. This opening is occupied by a sliding-plate, B, of its own length and width. At its outer end a chamber, g, (see iig. 5,) is formed, corresponding with and fitting at its end with -theedges of d, and is of a depth equal to that of the intended lip, so that when the two chambers are placed together they shall form the usual cavity and lip for a handle, as show n. The sliding-plate B is as thick as the plate, or nearly so, and at its inner end is entered into a channel-or groove, hf, cut from the under side of the' plate nearly through it, and extending towards the centre suliciently to permit the slide to move a little further than the distance equal to the depth of the intended lip. The slide is kept up by a thin metal plate, m, secured underneath it. It is supported at its outer end by slide-pieces ,7c 76 fitted along the sides of d. y

The'operation of the apparatus is this: The plate having the chambers d and g closed upon each other, the 4pattern is moulded within the flask in the position of fig. 5, (in the usual way,) during which process the chambers become'V filled with the sand. thoroughly rammed into them.- The iiaskbeing then turned over, the

under part of the pattern is moulded vwithin the cope in the position shown in tig. 6. When the cope has been Y removed the slide 'with the-chamber g is Ato be moved inwards until,` as shown in iig. 6, it uncovers the sand moulded within it, when the pattern can be drawn upwards without disturbing the sand, leaving a corestanding shaped as shown at g. 7, with, at t, a space for the cast metal to form the required lip. The cope being replaced and the usual adjustments made, the mould is readyl to receive the metal. Y i

The superiority of this process over the Vusual method -of casting is manifest. The core being formed of green-sand in the usual 4course of moulding the upper part'of the pattern, so as to leave upon the removal of the cope nothing to do in order to permit the drawing of the pattern but to move the slide as described, withoutany fitting in of separate cores and the previous preparation vof the'cores, reduces what is now a complex and delicate operationto the footing of ordinarygreemsand moulding, effecting Va very important saving of time, care, labor, and consequently expenses in the process of casting pot-hole covers. v What claim as my invention, land desire to secure by Letters Patent, is, in the construction of patterns for moulding pot-hole covers and analogous objectsi The chamber d, in combination with the plate B, with its chamber g, tted to occupy the cavity ff, and to slide within the channel t, substantially as described, and for the purposes set forth in this specification.

WM.` J. FRYER.

Witnesses:

Riem). Vanier: DE WlTT,

D. W. DE WITT. 

